Method of producing cast tablets



E. B. CLARK.

METHOD 0F PRQDUCING CAST TABLETS'.

APPLlCTlON FILED DEC. l5, 1920.

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E. B. CLARK.

METHOD 0F PRODUClNG CAST TABL'ETS. 'APPLICATION FILED Dems, 1920.'

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/N VE'IYTOR =WITIVESSE$ 'EDWARD B. CLARK, or xnoxvrrfrin, PENNSYLVANIA, kssreuoia` or, ONE-rintrlro Y GEQRGE'G. CHAMBERS, orsnwroxnnr, '.e-.tnr'vsyrn'renrzr I residingy at Knoxville, in the county l vof recent war.

Allegheny and State of Pennsylvania, a'

citizenvof the Unitedv States,'have invented or discovered certain new and useful -Improvements inv Methods of lfroducingv Gast Tablets, of which' improvements the following/Iisaspeciication.

- y invent-ion'Y relates to4 the production of tablets, such as those commonly set up in large office buildings' as directories of tenants, and those novv being widely erected in public and quasi publieplaces, bearing the names of men who havevserved in the The invention consists in a method of production, whereby tablets of relatively costly and not easily'worked moldable material, such for example as bronze, bearing legible characters, may be produced at relatively small expense. y

While I am primarily concernedwith the production of bronze tablets, it will be understood that the invention is generally ap? plicable to the making of tablets of any moldable material-ofv type metal for example, or of plaster or of celluloid. l

The invention consists in building, unit upon unit, the pattern from which the matrix is to be formed. By making provision, that each succeeding unit may within a Wide range bear any desired character, it becomes possible to produce any legend one desires, and to reproduce this legendin the finished tablet-all by mechanical .opera-v tions of simplest sort.

In the accompanying drawings Fig. I shows in front elevation such a ytablet as it is the object of my invention to produce; Fig. II shows in perspective a line which constitutes a pattern unit, as VI shall presently describe.

AThe invention consists, rst, in assembling in a linotype machine, a line'rof matricesl bearing legible characters in reverse; Second, in the further'operation of the machine, casting from the line of matrices so assembled a line bearing the characters in obverse; third, employing the line so cast as a unit in building up a pattern; and, nally, producing the tablet from the pattern in the usual manner.

The use of the linotype machine in the practice of myinvention involves these de- Application led December 15, 1920. Serial vrTo.'-430,8'75.l

` lvrnrrron'or 'Paone-cine caste renters.

l .Specification of Letters Patent. Y Ptevlvted Apr, 18,1922.

partures from normal linotype machine use;

'rst the matrices arespecially preparedtlife llegible* characters whichmtheyv bear fare formed, not asin linotype practice'in Voleverse but in reverse; the characters upon the line which is castiin the machine are not, inthe usual f reverse position, but in` obverse; Andiitisffurther to be remarkedthat; the

thing ultimately produced is not aV plate for 'i printingea" mere instrument byjrthjeiv use iof,` which 'something else `is to' be '"obtained,

namely, a printed page ,butfit itself, 'namely the casttablet, is the ultimate'produc'existf ing for "itself alone'. n t 'lnv normal `use the'linotype machine in semblingv` the matrices from which th'eiline of type is cast, alignsthem along the upper v. edges of the letters. VDifferent fonts of type involve the use of differently proportioned matrices. It follows'that in practical serv- 'ice in printing establishments the use of the linotype machine is confined -to typesetting from a single font of type. To the extent that other'type are'required. to be used, hand setting is resorted to. I

The matrices from which the llines Vare cast to make up a patternV for my tablet bear characters which in form are the reverse of the characters of type matrices. It follows that'the matrices assembled in the linotype machine are aligned along the-lower edges Yof the letters. Being so aligned the relative proportions of matrices assembled togetherV in a line cease tol be a disturbing factor, and

matrices of vvarious fonts may be brought together in the operation of themachine vand there is no need to resort to hand setting.

Referring to thev accompanyingdrawing,

a tablet is there illustrated such as my inv vention Will produce. The tablet vvill be seen to bear lines of legible characters,

' names, etc. Each of these lines'of legible characters may be produced from a pattern made in a linotype machine Fig; Il, for instance shows the pattern unit for the irst line, A which in this instance happensto be the word Knoxville. Such av unit as is shown Ain lig.k y II'may manifestly be produced with av linotype machine, employing matrices` which as compared with matrices used for printing bear legible Vcharacters in reverse.. -Such units as-Fig. II shows Aso produced kfor the various lines may be assembled with blank blocks, ornamental borders, medallions,

ico

raised lines, and the like, and the Whole Amade into a complete pattern.

From the pattern so prepared and assembled the matrix for the ultimate casting may be produced, and casting Will follow in the usual manner of proceeding.

In the pattern as Well as in the matrix for the ultimate casting opportunity is afforded for hand Work, eradicating seams and blemishes, artistic embellishments, etc.

As I have already intimated, the use of the linotype machine in practicing my invention is not klimited to lines set from matrices of a single Jfont, but matrices of different sizes may be assembled to Jform a single line.

Not all the characters in a line need be legible, but legible characters are essentially involved in the practice of the invention.

The characters upon the matrices of the linotype machine may be formed in intaglio or in relief, and correspondingly the characters upon the ultimate tablet will appear in relief or in intaglio.

The surface of the ultimate casting may i be worked over polished, colored, enameled, or gilded, as desired. v

acters in reverse in a line, casting an in- Y tegral line in the matrix so assembled and employingv the line so cast as a unit together with other units in the building up of the pattern. l

In testimony whereof I have hereunto set my hand.

EDWARD B. CLARK.

Witnesses:

BAYARD H. CHRISTY, FRANCIS J. ToMAssoN. 

